Сюда приходят собственную реализацию. Я разрешаю вам изменять его, чтобы удалить дубликаты, если хотите.
import itertools
class Matrix():
def __init__(self, matrix):
self.matrix = matrix
def computeConnectedComponents(self):
rows_id = list(range(len(self.matrix)))
cols_id = list(range(len(self.matrix[0])))
#here are the position of every 1 in the grid. (row number, column number) indexes start at 0
positions = [couple for couple in self.generate_pairs(rows_id, cols_id) if self.matrix[couple[0]][couple[1]]==1]
#here we store all the connected component finded
allConnectedComponents = []
#while there is position not affected to any connected component
while positions != [] :
#the first element is taken as start of the connected component
to_explore = [positions.pop(0)]
currentConnectedComponent = set()
#while there is node connected to a node connected to the component
while list(to_explore) != []:
currentNode = to_explore.pop()
currentConnectedComponent.add(currentNode)
to_explore += [coord for coord in self.node_neighbourhood(currentNode) if (self.matrix[coord[0]][coord[1]]==1 and (coord not in to_explore) and (coord not in currentConnectedComponent))]
allConnectedComponents.append(currentConnectedComponent)
positions = [position for position in positions if position not in currentConnectedComponent]
return allConnectedComponents
#http://stackoverflow.com/questions/16135833/generate-combinations-of-elements-from-multiple-lists
def generate_pairs(self, *args):
for i, l in enumerate(args, 1):
for x, y in itertools.product(l, itertools.chain(*args[i:])):
yield (x, y)
def node_neighbourhood(self, coordinates):
row, column = coordinates[0], coordinates[1]
result = []
if (row - 1) >= 0 :
result.append((row-1, column))
if (row + 1) < len(self.matrix):
result.append((row+1, column))
if (column - 1) >= 0:
result.append((row, column-1))
if (column + 1) < len(self.matrix[0]):
result.append((row, column+1))
return result
if __name__ == "__main__":
data = [[1,0,0,0,0],
[0,0,1,1,0],
[0,0,1,1,0],
[1,0,0,0,0],
[1,1,0,0,0]]
matrix = Matrix(data)
for connectedComponent in matrix.computeConnectedComponents():
print(connectedComponent)